3 * Copyright (C) 2012 Samsung Electronics Co.Ltd
5 * Inki Dae <inki.dae@samsung.com>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
15 #include <linux/kernel.h>
16 #include <linux/module.h>
17 #include <linux/platform_device.h>
19 #include <drm/exynos_drm.h>
22 #include "drm_crtc_helper.h"
24 #include "exynos_drm_drv.h"
25 #include "exynos_drm_crtc.h"
26 #include "exynos_drm_encoder.h"
28 /* vidi has totally three virtual windows. */
31 #define get_vidi_context(dev) platform_get_drvdata(to_platform_device(dev))
33 struct vidi_win_data {
34 unsigned int offset_x;
35 unsigned int offset_y;
36 unsigned int ovl_width;
37 unsigned int ovl_height;
38 unsigned int fb_width;
39 unsigned int fb_height;
43 unsigned int buf_offsize;
44 unsigned int line_size; /* bytes */
49 struct exynos_drm_subdrv subdrv;
50 struct drm_crtc *crtc;
51 struct vidi_win_data win_data[WINDOWS_NR];
52 struct edid *raw_edid;
54 unsigned int default_win;
55 unsigned long irq_flags;
56 unsigned int connected;
59 struct work_struct work;
63 static const char fake_edid_info[] = {
64 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x05, 0x05,
65 0x00, 0x00, 0x00, 0x00, 0x30, 0x12, 0x01, 0x03, 0x80, 0x10, 0x09, 0x78,
66 0x0a, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xbd,
67 0xee, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
68 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x66, 0x21, 0x50, 0xb0, 0x51, 0x00,
69 0x1b, 0x30, 0x40, 0x70, 0x36, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e,
70 0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00,
71 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18,
72 0x4b, 0x1a, 0x44, 0x17, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
73 0x00, 0x00, 0x00, 0xfc, 0x00, 0x53, 0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47,
74 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xbc, 0x02, 0x03, 0x1e, 0xf1,
75 0x46, 0x84, 0x05, 0x03, 0x10, 0x20, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83,
76 0x01, 0x00, 0x00, 0xe2, 0x00, 0x0f, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00,
77 0xb8, 0x2d, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c,
78 0x25, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a,
79 0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0xa0, 0x5a, 0x00, 0x00,
80 0x00, 0x18, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c,
81 0x45, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0x00,
82 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
83 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
84 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
85 0x00, 0x00, 0x00, 0x06
88 static bool vidi_display_is_connected(struct device *dev)
90 struct vidi_context *ctx = get_vidi_context(dev);
92 DRM_DEBUG_KMS("%s\n", __FILE__);
95 * connection request would come from user side
96 * to do hotplug through specific ioctl.
98 return ctx->connected ? true : false;
101 static int vidi_get_edid(struct device *dev, struct drm_connector *connector,
104 struct vidi_context *ctx = get_vidi_context(dev);
105 struct edid *raw_edid;
107 DRM_DEBUG_KMS("%s\n", __FILE__);
110 * the edid data comes from user side and it would be set
111 * to ctx->raw_edid through specific ioctl.
113 if (!ctx->raw_edid) {
114 DRM_DEBUG_KMS("raw_edid is null.\n");
118 raw_edid = kzalloc(len, GFP_KERNEL);
120 DRM_DEBUG_KMS("failed to allocate raw_edid.\n");
124 memcpy(raw_edid, ctx->raw_edid, min((1 + ctx->raw_edid->extensions)
125 * EDID_LENGTH, len));
127 /* attach the edid data to connector. */
128 connector->display_info.raw_edid = (char *)raw_edid;
130 memcpy(edid, ctx->raw_edid, min((1 + ctx->raw_edid->extensions)
131 * EDID_LENGTH, len));
136 static void *vidi_get_panel(struct device *dev)
138 DRM_DEBUG_KMS("%s\n", __FILE__);
145 static int vidi_check_timing(struct device *dev, void *timing)
147 DRM_DEBUG_KMS("%s\n", __FILE__);
154 static int vidi_display_power_on(struct device *dev, int mode)
156 DRM_DEBUG_KMS("%s\n", __FILE__);
163 static struct exynos_drm_display_ops vidi_display_ops = {
164 .type = EXYNOS_DISPLAY_TYPE_VIDI,
165 .is_connected = vidi_display_is_connected,
166 .get_edid = vidi_get_edid,
167 .get_panel = vidi_get_panel,
168 .check_timing = vidi_check_timing,
169 .power_on = vidi_display_power_on,
172 static void vidi_dpms(struct device *subdrv_dev, int mode)
174 struct vidi_context *ctx = get_vidi_context(subdrv_dev);
176 DRM_DEBUG_KMS("%s, %d\n", __FILE__, mode);
178 mutex_lock(&ctx->lock);
181 case DRM_MODE_DPMS_ON:
184 case DRM_MODE_DPMS_STANDBY:
185 case DRM_MODE_DPMS_SUSPEND:
186 case DRM_MODE_DPMS_OFF:
190 DRM_DEBUG_KMS("unspecified mode %d\n", mode);
194 mutex_unlock(&ctx->lock);
197 static void vidi_apply(struct device *subdrv_dev)
199 struct vidi_context *ctx = get_vidi_context(subdrv_dev);
200 struct exynos_drm_manager *mgr = ctx->subdrv.manager;
201 struct exynos_drm_manager_ops *mgr_ops = mgr->ops;
202 struct exynos_drm_overlay_ops *ovl_ops = mgr->overlay_ops;
203 struct vidi_win_data *win_data;
206 DRM_DEBUG_KMS("%s\n", __FILE__);
208 for (i = 0; i < WINDOWS_NR; i++) {
209 win_data = &ctx->win_data[i];
210 if (win_data->enabled && (ovl_ops && ovl_ops->commit))
211 ovl_ops->commit(subdrv_dev, i);
214 if (mgr_ops && mgr_ops->commit)
215 mgr_ops->commit(subdrv_dev);
218 static void vidi_commit(struct device *dev)
220 struct vidi_context *ctx = get_vidi_context(dev);
222 DRM_DEBUG_KMS("%s\n", __FILE__);
228 static int vidi_enable_vblank(struct device *dev)
230 struct vidi_context *ctx = get_vidi_context(dev);
232 DRM_DEBUG_KMS("%s\n", __FILE__);
237 if (!test_and_set_bit(0, &ctx->irq_flags))
238 ctx->vblank_on = true;
243 static void vidi_disable_vblank(struct device *dev)
245 struct vidi_context *ctx = get_vidi_context(dev);
247 DRM_DEBUG_KMS("%s\n", __FILE__);
252 if (test_and_clear_bit(0, &ctx->irq_flags))
253 ctx->vblank_on = false;
256 static struct exynos_drm_manager_ops vidi_manager_ops = {
259 .commit = vidi_commit,
260 .enable_vblank = vidi_enable_vblank,
261 .disable_vblank = vidi_disable_vblank,
264 static void vidi_win_mode_set(struct device *dev,
265 struct exynos_drm_overlay *overlay)
267 struct vidi_context *ctx = get_vidi_context(dev);
268 struct vidi_win_data *win_data;
270 unsigned long offset;
272 DRM_DEBUG_KMS("%s\n", __FILE__);
275 dev_err(dev, "overlay is NULL\n");
280 if (win == DEFAULT_ZPOS)
281 win = ctx->default_win;
283 if (win < 0 || win > WINDOWS_NR)
286 offset = overlay->fb_x * (overlay->bpp >> 3);
287 offset += overlay->fb_y * overlay->pitch;
289 DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n", offset, overlay->pitch);
291 win_data = &ctx->win_data[win];
293 win_data->offset_x = overlay->crtc_x;
294 win_data->offset_y = overlay->crtc_y;
295 win_data->ovl_width = overlay->crtc_width;
296 win_data->ovl_height = overlay->crtc_height;
297 win_data->fb_width = overlay->fb_width;
298 win_data->fb_height = overlay->fb_height;
299 win_data->dma_addr = overlay->dma_addr[0] + offset;
300 win_data->vaddr = overlay->vaddr[0] + offset;
301 win_data->bpp = overlay->bpp;
302 win_data->buf_offsize = (overlay->fb_width - overlay->crtc_width) *
304 win_data->line_size = overlay->crtc_width * (overlay->bpp >> 3);
307 * some parts of win_data should be transferred to user side
308 * through specific ioctl.
311 DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n",
312 win_data->offset_x, win_data->offset_y);
313 DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
314 win_data->ovl_width, win_data->ovl_height);
315 DRM_DEBUG_KMS("paddr = 0x%lx, vaddr = 0x%lx\n",
316 (unsigned long)win_data->dma_addr,
317 (unsigned long)win_data->vaddr);
318 DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n",
319 overlay->fb_width, overlay->crtc_width);
322 static void vidi_win_commit(struct device *dev, int zpos)
324 struct vidi_context *ctx = get_vidi_context(dev);
325 struct vidi_win_data *win_data;
328 DRM_DEBUG_KMS("%s\n", __FILE__);
333 if (win == DEFAULT_ZPOS)
334 win = ctx->default_win;
336 if (win < 0 || win > WINDOWS_NR)
339 win_data = &ctx->win_data[win];
341 win_data->enabled = true;
343 DRM_DEBUG_KMS("dma_addr = 0x%x\n", win_data->dma_addr);
346 schedule_work(&ctx->work);
349 static void vidi_win_disable(struct device *dev, int zpos)
351 struct vidi_context *ctx = get_vidi_context(dev);
352 struct vidi_win_data *win_data;
355 DRM_DEBUG_KMS("%s\n", __FILE__);
357 if (win == DEFAULT_ZPOS)
358 win = ctx->default_win;
360 if (win < 0 || win > WINDOWS_NR)
363 win_data = &ctx->win_data[win];
364 win_data->enabled = false;
369 static struct exynos_drm_overlay_ops vidi_overlay_ops = {
370 .mode_set = vidi_win_mode_set,
371 .commit = vidi_win_commit,
372 .disable = vidi_win_disable,
375 static struct exynos_drm_manager vidi_manager = {
377 .ops = &vidi_manager_ops,
378 .overlay_ops = &vidi_overlay_ops,
379 .display_ops = &vidi_display_ops,
382 static void vidi_finish_pageflip(struct drm_device *drm_dev, int crtc)
384 struct exynos_drm_private *dev_priv = drm_dev->dev_private;
385 struct drm_pending_vblank_event *e, *t;
388 bool is_checked = false;
390 spin_lock_irqsave(&drm_dev->event_lock, flags);
392 list_for_each_entry_safe(e, t, &dev_priv->pageflip_event_list,
394 /* if event's pipe isn't same as crtc then ignore it. */
400 do_gettimeofday(&now);
401 e->event.sequence = 0;
402 e->event.tv_sec = now.tv_sec;
403 e->event.tv_usec = now.tv_usec;
405 list_move_tail(&e->base.link, &e->base.file_priv->event_list);
406 wake_up_interruptible(&e->base.file_priv->event_wait);
411 * call drm_vblank_put only in case that drm_vblank_get was
414 if (atomic_read(&drm_dev->vblank_refcount[crtc]) > 0)
415 drm_vblank_put(drm_dev, crtc);
418 * don't off vblank if vblank_disable_allowed is 1,
419 * because vblank would be off by timer handler.
421 if (!drm_dev->vblank_disable_allowed)
422 drm_vblank_off(drm_dev, crtc);
425 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
428 static void vidi_fake_vblank_handler(struct work_struct *work)
430 struct vidi_context *ctx = container_of(work, struct vidi_context,
432 struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
433 struct exynos_drm_manager *manager = subdrv->manager;
435 if (manager->pipe < 0)
438 /* refresh rate is about 50Hz. */
439 usleep_range(16000, 20000);
441 drm_handle_vblank(subdrv->drm_dev, manager->pipe);
442 vidi_finish_pageflip(subdrv->drm_dev, manager->pipe);
445 static int vidi_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
447 DRM_DEBUG_KMS("%s\n", __FILE__);
450 * enable drm irq mode.
451 * - with irq_enabled = 1, we can use the vblank feature.
453 * P.S. note that we wouldn't use drm irq handler but
454 * just specific driver own one instead because
455 * drm framework supports only one irq handler.
457 drm_dev->irq_enabled = 1;
460 * with vblank_disable_allowed = 1, vblank interrupt will be disabled
461 * by drm timer once a current process gives up ownership of
462 * vblank event.(after drm_vblank_put function is called)
464 drm_dev->vblank_disable_allowed = 1;
469 static void vidi_subdrv_remove(struct drm_device *drm_dev)
471 DRM_DEBUG_KMS("%s\n", __FILE__);
476 static int vidi_power_on(struct vidi_context *ctx, bool enable)
478 struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
479 struct device *dev = subdrv->dev;
481 DRM_DEBUG_KMS("%s\n", __FILE__);
483 if (enable != false && enable != true)
487 ctx->suspended = false;
489 /* if vblank was enabled status, enable it again. */
490 if (test_and_clear_bit(0, &ctx->irq_flags))
491 vidi_enable_vblank(dev);
495 ctx->suspended = true;
501 static int vidi_show_connection(struct device *dev,
502 struct device_attribute *attr, char *buf)
505 struct vidi_context *ctx = get_vidi_context(dev);
507 mutex_lock(&ctx->lock);
509 rc = sprintf(buf, "%d\n", ctx->connected);
511 mutex_unlock(&ctx->lock);
516 static int vidi_store_connection(struct device *dev,
517 struct device_attribute *attr,
518 const char *buf, size_t len)
520 struct vidi_context *ctx = get_vidi_context(dev);
523 DRM_DEBUG_KMS("%s\n", __FILE__);
525 ret = kstrtoint(buf, 0, &ctx->connected);
529 if (ctx->connected > 1)
532 /* use fake edid data for test. */
534 ctx->raw_edid = (struct edid *)fake_edid_info;
536 /* if raw_edid isn't same as fake data then it can't be tested. */
537 if (ctx->raw_edid != (struct edid *)fake_edid_info) {
538 DRM_DEBUG_KMS("edid data is not fake data.\n");
542 DRM_DEBUG_KMS("requested connection.\n");
544 drm_helper_hpd_irq_event(ctx->subdrv.drm_dev);
549 static DEVICE_ATTR(connection, 0644, vidi_show_connection,
550 vidi_store_connection);
552 int vidi_connection_ioctl(struct drm_device *drm_dev, void *data,
553 struct drm_file *file_priv)
555 struct vidi_context *ctx = NULL;
556 struct drm_encoder *encoder;
557 struct exynos_drm_manager *manager;
558 struct exynos_drm_display_ops *display_ops;
559 struct drm_exynos_vidi_connection *vidi = data;
560 struct edid *raw_edid;
563 DRM_DEBUG_KMS("%s\n", __FILE__);
566 DRM_DEBUG_KMS("user data for vidi is null.\n");
570 if (vidi->connection > 1) {
571 DRM_DEBUG_KMS("connection should be 0 or 1.\n");
575 list_for_each_entry(encoder, &drm_dev->mode_config.encoder_list,
577 manager = exynos_drm_get_manager(encoder);
578 display_ops = manager->display_ops;
580 if (display_ops->type == EXYNOS_DISPLAY_TYPE_VIDI) {
581 ctx = get_vidi_context(manager->dev);
587 DRM_DEBUG_KMS("not found virtual device type encoder.\n");
591 if (ctx->connected == vidi->connection) {
592 DRM_DEBUG_KMS("same connection request.\n");
596 if (vidi->connection) {
598 DRM_DEBUG_KMS("edid data is null.\n");
601 raw_edid = (struct edid *)(uint32_t)vidi->edid;
602 edid_len = (1 + raw_edid->extensions) * EDID_LENGTH;
603 ctx->raw_edid = kzalloc(edid_len, GFP_KERNEL);
604 if (!ctx->raw_edid) {
605 DRM_DEBUG_KMS("failed to allocate raw_edid.\n");
608 memcpy(ctx->raw_edid, raw_edid, edid_len);
611 * with connection = 0, free raw_edid
612 * only if raw edid data isn't same as fake data.
614 if (ctx->raw_edid && ctx->raw_edid !=
615 (struct edid *)fake_edid_info) {
616 kfree(ctx->raw_edid);
617 ctx->raw_edid = NULL;
621 ctx->connected = vidi->connection;
622 drm_helper_hpd_irq_event(ctx->subdrv.drm_dev);
627 static int __devinit vidi_probe(struct platform_device *pdev)
629 struct device *dev = &pdev->dev;
630 struct vidi_context *ctx;
631 struct exynos_drm_subdrv *subdrv;
634 DRM_DEBUG_KMS("%s\n", __FILE__);
636 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
640 ctx->default_win = 0;
642 INIT_WORK(&ctx->work, vidi_fake_vblank_handler);
644 subdrv = &ctx->subdrv;
646 subdrv->manager = &vidi_manager;
647 subdrv->probe = vidi_subdrv_probe;
648 subdrv->remove = vidi_subdrv_remove;
650 mutex_init(&ctx->lock);
652 platform_set_drvdata(pdev, ctx);
654 ret = device_create_file(&pdev->dev, &dev_attr_connection);
656 DRM_INFO("failed to create connection sysfs.\n");
658 exynos_drm_subdrv_register(subdrv);
663 static int __devexit vidi_remove(struct platform_device *pdev)
665 struct vidi_context *ctx = platform_get_drvdata(pdev);
667 DRM_DEBUG_KMS("%s\n", __FILE__);
669 exynos_drm_subdrv_unregister(&ctx->subdrv);
671 if (ctx->raw_edid != (struct edid *)fake_edid_info) {
672 kfree(ctx->raw_edid);
673 ctx->raw_edid = NULL;
681 #ifdef CONFIG_PM_SLEEP
682 static int vidi_suspend(struct device *dev)
684 struct vidi_context *ctx = get_vidi_context(dev);
686 return vidi_power_on(ctx, false);
689 static int vidi_resume(struct device *dev)
691 struct vidi_context *ctx = get_vidi_context(dev);
693 return vidi_power_on(ctx, true);
697 static const struct dev_pm_ops vidi_pm_ops = {
698 SET_SYSTEM_SLEEP_PM_OPS(vidi_suspend, vidi_resume)
701 struct platform_driver vidi_driver = {
703 .remove = __devexit_p(vidi_remove),
705 .name = "exynos-drm-vidi",
706 .owner = THIS_MODULE,